Premium quality stereo 2-way/3-way/mono 4-way crossover Individual Limiters on each output for optimal loudspeaker protection Adjustable time delay for phase alignment between drivers CD horn equalization for constant directivity horn compensation Low Sumfunction provides Mono output for Subwoofer operation Individual output Gain controls for all bands. Mute switches for Individual output makes band adjustment easy Individual Phase reverse switches for instant phase correction Switchable 25 Hz Low cut filter on each input for low-frequency driver protection Balanced XLR connectors for all inputs and outputs